Questions tagged [limit]
Limiting the usage of a resource (memory, disk space, CPU time, open files, network bandwidth, …) by a process or a group of processes.
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EINTR implementation in the kernel sources - statfs & newfstatat
I'm trying to locate where in the kernel source files does statfs and newfstatat syscalls might fail with EINTR (due to a pending signal).
The man pages list EINTR as one of the possible errors these ...
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How to limit the number of files printed by ls and print them in columns like ls prints normally?
Here is extension of the question: How do I limit the number of files printed by ls?
with additional condition: how to print results in as many columns as fit to the current terminal width — as ls ...
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Piped dd command limits its output to 65536 bytes, why?
My colleague and I are both using a Docker container running Ubuntu 22.04.4 LTS (Jammy Jellyfish):
root@c2155d7af4a4:/# grep VERSION= /etc/os-release
VERSION="22.04.4 LTS (Jammy Jellyfish)"
...
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How to get rid of ssh bandwidth limit?
I was playing around with a server I set up myself, running archlinux, and when I tried to retrieve files from it, using scp or rsync, I noticed the download speed was abnormally low, being capped at ...
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How to prevent relayd on OpenBSD from using all memory
I have an OpenBSD "firewall" with relayd, where relayd starts to consume all available memory to the point that the system becomes completely non responsive. This happens when a user starts ...
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How to limit the memory used for each process of a certain binary?
I have a process which is part of standalone, non-service executable.
The process in question spawns thousands of co-processes under a single binary. I'd like to limit the memory usage of processes ...
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Limit CPU usage of background process if system is busy
At the moment I do the following: When I see that the system load of my Ubuntu server is high, I get the PIDs of specific currently running background processes and start cpulimit with the PID. When ...
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What is the way to enforce daily write limits on a disk partition in linux?
I would like to enforce certain write limits on my disk partitions. I would like to limit the amount of data application can write on a given disk partition on hourly, daily or weekly basis.
Is there ...
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Performance limits of file I/O vs Unix pipes on multicore systems
I am running some benchmarks where I have a program that performs some file IO. It creates a fresh directory, writes and reads some files to that directory, and then deletes it. When I run this ...
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Resource limits getting enforced only for processes in user's terminal not for su [user] from root's terminal
Cgroups v2 is enabled in almalinux 9.1 with kernel 5.14.0-70.22.1.el9_0.x86_64 and systemd 250 (250-12.el9_1.3).
Content of /etc/systemd/system/user-1002.slice.d/override.conf:
[Unit]
Description=User ...
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How to limit the concurrent GUI login, but allow multiple SSH login?
On an Ubuntu desktop, contains several accounts, I want to limit the GUI login number.
At anytime, there should be only one account can login by using local GUI. (The first account must logout before ...
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grep: What is the limit for a pattern file size
I am using grep with the -f option and I run into an issue when the pattern file given with -f is very long. The one that is failing for me has almost 300 thousand lines and 40 MBytes. grep does not ...
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How limit CPU/Ram on a system service on nixos?
My metabase service is eating all the resources on my machine, and while found a solution I need a way to limit the usage the resources.
How can I configure it on nixos?
❯ nixos-version
22.05.2123....
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How to determine "number of concurrent sessions" for all users on a server
I am trying to determine the total number of concurrent sessions on a server to determine a good number for the maxlogins option in /etc/security/limits.conf. How is the number of sessions calculated ...
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systemd/cgroup resource limits -- different behaviour between hosts
I'm heavily confused. I have a physical server running Ubuntu 20.04 and a vagrant (VirtualBox) virtual machine also running Ubuntu 20.04. Both are running with hwe 5.13 kernel and systemd 245 (245.4-...
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Transparently Rate Limiting ANY Connection that is Already In-Progress
Let's say I begin a large download, and (about an hour into it) I find that it is consuming too much of my overall bandwidth.
Is there any way to rate limit that particular connection "after the ...
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systemd resource control -- all users/root
I'm using Debian Bullseye with systemd 247. I have more than a hundred of users and I would like to enforce some limits using cgroups. I use set-property, which works as expected, for example for the ...
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Linux: Is there a limit for the number of fork() calls one process goup can issue? (Not per user!)
We have a strange problem on a SuSE Linux Enterprise Server 12.5 system (kernel 4.12.14-122.60), which is the only KVM guest in a simliar KVM host:
One service started by systemd starts one program -&...
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How can I limit bandwidth per connection using tc?
I am pretty new to Linux and tc command and lately I have been looking for a solution to limit bandwidth per connection using the tc command. I have a server application that handles requests from ...
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Values from sysctl -A don't match /etc/sysctl.conf even after restart
I'm on Mac Monterey 12.1 and increased my shared memory limits in /etc/sysctl.conf file:
kern.sysv.shmmax: 16777216
kern.sysv.shmmin: 1
kern.sysv.shmmni: 128
kern.sysv.shmseg: 512
kern.sysv.shmall: ...
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Can't set fs.nr_open limit via sysctl
I'm trying to set fs.nr_open via sysctl (for learning purpose) to different value, other than default 1048576
These are sysctl settings after system was booted:
vud@ubuntu:~$ sudo sysctl -a | grep -E '...
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Create limitations systemd service file
I wanted to set some limits for my systemd service, such as:
Network bandwidth
Cpu quote
If the limit is over, then systemd service should stop.
Thank you in advance
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How do I make a Linux process believe it is using 100% of CPU while limiting it with a cgroup?
Cgroups allow artificially limiting CPU time available to a process using cpu.cfs_quota_us and cpu.cfs_period_us parameters.
This however results in a discrepancy when the program monitors its CPU ...
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OpenBSD 6.9 - ENOMEM error on execve (execvp)
I've compiled a program on OpenBSD 6.9 and when I execute the program, I get an enomem error related specifically to execvp which the man pages say is a font-end for execve.
The execve man page ...
user474102
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How to get the correct device to limit block IO for docker container?
(I posted this question at stackoverflow, but maybe here is the more appropriate place, if necessary - I'll delete the other question.)
I need to put a limit on block IO operations speed for a number ...
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How to best hard-limit my Firefox' memory hogging?
I use Firefox 83 on my Devuan GNU/Linux Beowulf desktop.
Unfortunately, for reasons which are not clear to me, FF has memory issues which cause it to gradually take up more and more of my system's ...
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LVM 4,55 TiB Volume Group. I only can create a 2.70TiB logical volume
I create a Volume Group with 3 disks, 2 of 931g, and 1 of 2.73t. It seems like works propertly.
sudo pvs
PV VG Fmt Attr PSize PFree
/dev/sdb nxt lvm2 a-- 931.51g 931.51g
/dev/...
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Is there a file system out there that supports custom file size limit?
I'm aware that EXT4 has a max_dir_size_kb mount option to set up the max size of each directory. It doesn't have a similar option to specify the max size of individual files, though.
Is somebody aware ...
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Where does the systemctl Tasks (limit=) come from and can I temporarily change it?
I am having trouble with Tomcat 9, openjdk 11.0.9.1 on ubuntu 18.04. I installed it using these instructions: https://linuxize.com/post/how-to-install-tomcat-9-on-ubuntu-18-04/
It worked fine for a ...
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limits.conf not working for SSH connections on Fedora 33
I am trying to set a limit on a group called rlimited. I have the following in my /etc/security/limits.conf
@rlimited hard cpu 5
The same file exists in the /etc/security/limits.d/ folder.
I've also ...
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rhel 7 setting stack size to unlimited
I have some old code that needs the stack to not be limited to 8192kb in order for it to run.
I am used to doing this in /etc/security/limits.conf
* stack hard unlimited
* stack soft ...
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Limit bandwidth for outgoing/incoming with latency for specific port using TC
I'm trying to limit the incoming and outgoing bandwidth with latency through a specific port using TC but I can't get it to work 100%. I'm not sure if I've done it correctly.
When I ping google, the ...
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Linux Directory Size Limiting
I have a FTP server with anonymous access for my local network. Here I have directories named with department names. I want to limit the directory sizes in respect to departments.
/var/ftp/pub/
...
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Stop specific processes from heating up my system's CPU
I have a process doing some computation the whole time. It causes my system's CPU to heat up and the fan to spin faster.
I want this process to run, but with a low priority. I don't want my system to ...
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"Too Many Open Files" for Apache and java/tomcat. How to set per-process limits?
This problem has now appeared twice on my production Ubuntu machine running both a node server (tiny) and a Spring Boot Java server (the workhorse). The first time it happened, grinding my server to a ...
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Is there a limit for the read command?
I'm trying to write a bash script that will let me save a backup code (lots of numbers) in a file. I've finished the script but it's only letting me to save 4096 digits of the code.
I tried to do this:...
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How can I limit both pty and non-pty ssh sessions to 'maxlogins'?
I have a normal Linux user that is:
only allowed to login via ssh to execute a single command and nothing else
may never login more the once at a single time
The first restriction is implemented ...
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How can I limit the CPU usage (% of CPU)?
It happened to me multiple times now that a program which entered an infinite loop made the entire machine completely unresponsive, one time even foreign JavaScript, and I had to power off. This is ...
user361749
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AMDGPU driver vramlimit
I have a console installation of debian and i found that from the available 16GB of ram i can see only 14GB, this is because my APU (AMD) is reserving 2GB which is way too much for my needs. The bad ...
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Linux not enforcing limits correctly?
As an experiment on a test system, I tried to limit my own number of processes using /etc/security/limits.conf. When logged on the system I had 16 processes to my name running (all had ruid, euid and ...
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Limits of tmpfs filesystem
What are the limits of the tmpfs filesystem in terms of:
Maximum file size
Maximum file system size
Maximum subdirectories
Maximum symlink depth
I'm using a centOS 8. The tmpfs is mounted via:
[...
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Not able to increase ulimit -Hn, only shows up for a sudo su session
So I am trying to change my hard limit for file descriptors on Ubuntu18.04 laptop. I have tried everything but the changes have still not taken effect.
I need to run a go program which keeps throwing ...
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Unable to login to a user(oracle) "error: resource temporary unavailable"
When I try to login to oracle via ssh or su - oracle it shows following error
**error:resource temporary unavailable**
CPU Memory & IOps utilization is normal
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How can df report different information depending in it's target path?
Example:
root@myinstance:/my/instance/path# df -h
Filesystem Size Used Avail Use% Mounted on
...
/dev/mapper/hdd-place 13T 899G 12T 8% /run/iss
...
root@myinstance:/my/instance/...
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"Xorg" process does not take limits from /etc/security/limits.conf
I have this in my /etc/security/limits.conf:
#<domain> <type> <item> <value>
root - memlock 65536
root - stack 524288
root ...
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limits.conf nproc not being applied
this is our limits.conf
* soft nofile 999999
* hard nofile 999999
* soft noproc 256000
* hard noproc 256000
and then we check for the changes after a reboot, ...
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How to "soft-limit" CPU usage of a process
I have some processes running on Debian that I want to limit cpu of it usage in the "soft" manner. For example, if it eats more than 70% of a single core for more than 15 minutes, the CPU ...
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1
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limits.conf is not working
I'm trying to set default niceness/priority for a user's processes on Ubuntu 18.04.3 LTS in limits.conf and everything I write in limits.conf is simply ignored. Hard nice, soft nice, hard priority, ...
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Processes started through SSH add up to limit of SSH Daemon (systemd)
on a productive server there are (background) processes started by users which connect through SSH and run some scripts. These processes are daemons and keep on running. Each started process is found ...
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Is it possible to impose a minimum niceness on a specific user?
Is it possible to limit a specific user's processes to always run with a niceness of at least 15, say?
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